Yeah, they should really add a “V5 style display mode” that just works fast. I have asked for that since day one. But upgrading your hardware is obviously part of the game if you want to benefit from new technology.
BTW. You can try this display mode and see if that works any better for you:
V5 Render mode.ini (11.3 KB)
You just have to download the installers for Rhino6. Both Penguin and Flamingo is updated and they are free.
My guess is that your windows installation is 10 years old too and that it would benefit a lot from a fresh install. My homecomputer is a dual xeon with a GTX1070 that I use for HTC Vive was doing OK and not great because of the single core speed of the older CPU, but then windows crashed on me and I had to do a full install. (The previous OS was an upgraded windows 10 pro, so a new installation was done in less than an hour) and after that everything is just running smoother. No lag in the VR demos that lagged before and Rhino is performing smoother. So I’m just saying that blaming Rhino for slow hardware communication might not be the right thing.